<html>
<!--notification_tester.html
Script with javascript functions for creating and canceling notifications.
Also can be used to request permission for notifications.
-->
<script>

// Array of all notifications this page has created.
var g_notifications = [];
// Whether the site has requested and been granted permission.
var g_permissionGranted = false;
// Currently active media stream.
var g_mediaStream = null;

// Creates a notification with a iconUrl, title, text, and tag.
// Returns an id for the notification, which can be used to cancel it with
// |cancelNotification|. If two notifications are created with the same
// tag, the second one should replace the first.
function createNotification(iconUrl, title, text, tag, onclick) {
  var notification = new Notification(title, {
    icon: iconUrl,
    body: text,
    tag: tag
  });
  notification.onclick = onclick;

  createNotificationHelper(notification, true);
}

// Cancels a notification with the given id. The notification must be showing,
// as opposed to waiting to be shown in the display queue.
// Returns '1' on success.
function cancelNotification(id) {
  if (id < 0 || id > g_notifications.length) {
    var errorMsg = "Attempted to cancel notification with invalid ID.\n" +
        "ID: " + id + "\n# of notifications: " + g_notifications.length;
    sendResultToTest(errorMsg);
  }
  g_notifications[id].onclose = function() {
    sendResultToTest(1);
  }
  g_notifications[id].close();
}

// Requests permission for this origin to create notifications. Immediately
// sends the result without waiting for callbacks to complete.
function requestPermissionAndRespond() {
  Notification.requestPermission(permissionCallbackNoResponse);
  sendResultToTest('requested');
}

// Requests permission for this origin to create notifications. The result will
// be sent from the callback (permissionCallbackWithResponse);
function requestPermission() {
  Notification.requestPermission(permissionCallbackWithResponse);
}

// Checks the notification permission status. The result will be sent directly
// via permissionCallbackWithResponse.
function queryPermissionStatus() {
  sendResultToTest(Notification.permission);
}

// Callback for requestPermissionAndRespond. Will send the permission status to
// the test driver.
function permissionCallbackWithResponse(permissionStatus) {
  if (permissionStatus === 'granted')
    sendResultToTest('request-callback-granted');
  else if (permissionStatus === 'denied')
    sendResultToTest('request-callback-denied');
  else if (permissionStatus === 'default')
    sendResultToTest('request-callback-default');
}

// Callback for requesting notification privileges.
function permissionCallbackNoResponse() {
  g_permissionGranted = true;
}

// Starts a screen capture session and reports success to the test driver.
function startScreenCapture() {
  navigator.mediaDevices.getDisplayMedia({video: true}).then((stream) => {
    g_mediaStream = stream;
    sendResultToTest('success');
  }).catch(() => {
    sendResultToTest('error');
  });
}

// Stops a screen capture session and reports success to the test driver.
function stopScreenCapture() {
  if (!g_mediaStream) {
    sendResultToTest('error');
    return;
  }
  for (const track of g_mediaStream.getTracks())
    track.stop();
  g_mediaStream = null;
  sendResultToTest('success');
}

// Helper function that adds a notification to |g_notifications| and shows
// it. The index of the notification is sent back to the test, or -1 is sent
// back on error. If |waitForDisplay| is true, the response will not be sent
// until the notification is actually displayed.
function createNotificationHelper(note, waitForDisplay) {
  function sendNotificationIdToTest() {
    sendResultToTest(g_notifications.length - 1);
  }
  g_notifications.push(note);
  if (waitForDisplay)
    note.onshow = sendNotificationIdToTest;
  note.onerror = function() {
    sendResultToTest(-1);
  }

  if (!waitForDisplay)
    sendNotificationIdToTest();
}

// Sends a result back to the main test logic.
function sendResultToTest(result) {
  // Convert the result to a string.
  var stringResult = "" + result;
  window.document.title = stringResult;
  if (typeof stringResult != "string")
    stringResult = JSON.stringify(result);
  window.domAutomationController.send(stringResult);
}

</script>

<body>
This page is used for testing HTML5 notifications.
</body>
</html>
